M25P20, M25P40, M25P80, M25P16, M25P32, M25P64 SPI FLASH C语言软件驱动源码void InitSPIMaster(void){/* P4SFS0 |= 0x70;     P4SFS1 |= 0x70; // Setup P4[4..6] Port as SPI // P4.7 works in GPIO mo...

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